钾肥对铅污染土壤白菜产量和品质的效应

为了探讨钾肥对铅污染土壤蔬菜安全生产的影响，本试验采用温室盆栽，研究了不同钾肥对紫色菜园土壤2种铅污染条件下白菜产量、营养品质和安全品质（硝酸盐和重金属）的影响。结果表明，与不施钾肥（CK1）相比，钾肥能显著提高铅污染土壤白菜产量和根系重量，施用钾肥增产幅度为9.5%~48.4%。施用钾肥显著降低白菜游离氨基酸和维生素C含量，增加还原糖的含量。铅污染土壤上，白菜硝酸盐含量增加，施用钾肥能降低白菜硝酸盐含量，降低幅度为15.3%~54.6%。硫酸钾能显著降低铅含量，氯化钾在低铅污染条件下低量施用时，显著增加铅含量，其余处理均显著降低铅含量。

Effect of Potassium Fertilizer on Cabbage Yield and Quality in Lead Pollution Soils

In order to explore the role of potassium fertilizer in safe vegetable production under lead pollution soils condition,a pot experiment was conducted to study the effects of different potassium fertilizers (potassium sulphate and potassium chloride) on cabbage yield,nutritional quality and safety quality (nitrate and heavy metals) in lead pollution soils.Results indicated that the yield and roots weight of cabbage were significantly increased by the fertilized treatments by 9.5%-48.4% compared to the CK1.Ap...